Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

perf: 1.c faster implementation of the leetcode TwoSum problem #902

Open
wants to merge 20 commits into
base: master
Choose a base branch
from
Open

perf: 1.c faster implementation of the leetcode TwoSum problem #902

Changes from all commits
Commits
Show all changes
20 commits
Select commit Hold shift + click to select a range
4ff5849
perf: faster implementation of the TwoSum problem
straight-into-the-wall Oct 21, 2021
6453a9e
doc: fixed typos on comments
straight-into-the-wall Oct 21, 2021
80e54d9
updating DIRECTORY.md
Oct 21, 2021
23c0485
fix: comments on includes. Doxygen file. static test function
straight-into-the-wall Oct 22, 2021
13330eb
Merge branch 'master' of github.com:TheAlgorithms/C
straight-into-the-wall Oct 25, 2021
e57c16d
fix: revert 1.c
straight-into-the-wall Oct 25, 2021
310c333
updating DIRECTORY.md
Oct 25, 2021
3240f54
Merge branch 'master' of github.com:TheAlgorithms/C into 1c
straight-into-the-wall Oct 25, 2021
e01e256
perf: faster implementation of the leetcode TwoSum problem
straight-into-the-wall Oct 25, 2021
00985b4
Merge branch 'TheAlgorithms:master' into master
straight-into-the-wall Nov 9, 2021
1f4a876
Merge remote-tracking branch 'upstream/master'
straight-into-the-wall Nov 21, 2021
28d082e
Merge branch 'master' into 1c
straight-into-the-wall Nov 21, 2021
475c735
doc: better comment on two sum test function
straight-into-the-wall Nov 21, 2021
d75ebe8
doc: added comment on two sum test function
straight-into-the-wall Nov 21, 2021
16ee7ce
fix: added main and missing comments
straight-into-the-wall Nov 21, 2021
ed9f08d
doc: add main comment
straight-into-the-wall Nov 21, 2021
70abeca
fix: file must ends with new line on leetcode/src/1.c
straight-into-the-wall Nov 22, 2021
057eb9e
fix: invalid conversion from (void *) to (int *)
straight-into-the-wall Nov 22, 2021
c4d37db
Update leetcode/src/1.c
straight-into-the-wall Nov 22, 2021
1209b17
Update leetcode/src/1.c
straight-into-the-wall Dec 10, 2021
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
156 changes: 155 additions & 1 deletion leetcode/src/1.c
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,7 +1,32 @@
/**
* @file
* @brief Implementation of the [Two
* sums](https://leetcode.com/problems/two-sum/) Leetcode problem
* @details
* A decent solution to the Two sum problem.
* @author [straight_into_the_wall](https://github.com/straight-into-the-wall)
*/

#include <assert.h> /// for assert
#include <stdint.h> /// for unsigned int with fixed size
#include <stdio.h> /// for IO operations
#include <stdlib.h> /// for malloc
#include <string.h> /// for string tools

/**
* @brief Given an array of integers nums and an integer target, return indices
* of the two numbers such that they add up to target.
*
* @param nums the array of integer in input.
* @param numsize the size of the array.
* @param target the integer target.
* @param returnsize the size of the returned array.
* @returns the converted new (malloced) string.
*/
int *twoSum(int *nums, int numsSize, int target, int *returnSize)
{
int i, j;
int *ret = calloc(2, sizeof(int));
int *ret = (int *) calloc(2, sizeof(int));
for (i = 0; i < numsSize; i++)
{
int key = target - nums[i];
Expand All @@ -15,3 +40,132 @@ int *twoSum(int *nums, int numsSize, int target, int *returnSize)
*returnSize = 2;
return ret;
}

/**
* @brief Two sum self-test implementation
* @returns void
*/
static void testTwoSum(int *nums, int numsSize, int target)
{
int retSize = 0;
int *ret = twoSum(nums, numsSize, target, &retSize);

for (int i = 0; i < retSize; i++) target -= nums[ret[i]];

free(ret);
assert(!target);
}

/**
* @brief Self-test implementations
* @returns void
*/
static void test(void)
straight-into-the-wall marked this conversation as resolved.
Show resolved Hide resolved
straight-into-the-wall marked this conversation as resolved.
Show resolved Hide resolved
{
int nums[4] = {2, 7, 15, 11};
testTwoSum(nums, 4, 9);

int nums1[4] = {2, -7, 11, 15};
testTwoSum(nums1, 4, 4);

int nums2[3] = {3, 2, 4};
testTwoSum(nums2, 3, 6);

int nums3[2] = {3, 3};
testTwoSum(nums3, 2, 6);

int nums4[3] = {3, -3, 6};
testTwoSum(nums4, 3, 0);

int nums5[6] = {-13, 0, 13, 7, -3, 6};
testTwoSum(nums5, 6, -7);

int nums6[5] = {-1, -2, -3, -4, -5};
testTwoSum(nums6, 5, -8);

int nums7[] = {
1931729, 5896941, -56160, -5999108, -713650, 3135403, 870300,
-2938196, -726482, -152831, -5552046, -6857780, 2493109, -2409591,
7453630, 7848984, -806578, 4976647, -9199319, -7660981, 4168359,
5466164, 8577624, -7465790, -7808993, -7176396, -3622579, 4996177,
9623530, -1371773, -5633028, 5188756, 7971646, -2603602, 7490338,
3174208, -1825054, 6892503, -8201151, -1072749, -2746872, -718104,
-1804706, 5504856, -9104958, -2181797, 3151933, -6116343, 1436458,
-659793, -9256591, -3487143, 3396195, -6211129, -2789647, -9336842,
-122743, -3843085, 8515885, -8551842, -8668581, -5040156, -9626107,
-5645393, -5484621, -6417906, 4483313, -4197219, -5762688, -6645419,
1077632, 7237401, 4819732, 5220382, 8657346, 651862, 7406097,
6668849, 5067699, 4563307, -4358391, -3996666, -4298897, -9870277,
-628517, 1842975, -4970541, -8815324, -4174656, -9332000, 4647373,
9461387, -3504914, 2614670, -1315721, 6099266, -8562834, -4488116,
9742133, 307556, 791291, -2611787, 7656675, 9932436, -1905766,
5142745, 7210001, -4678645, 550797, 8462302, 6815722, -2985059,
-1236401, -6093644, -6617192, -9438320, 8400183, 8936598, 5378080,
9758788, 817106, 8613435, 3579880, -9100698, 993960, 5352546,
8481471, 3526666, 2961295, -7819498, 834324, 3435605, 9725655,
8490290, 7263645, -6863345, 2947003, -8152353, 5514173, -9865666,
343864, -6386758, -8675825, -3252881, 1149651, 6690889, 7528843,
-2861961, -4722247, -6985318, -9994086, 7192089, -4864512, 5773490,
-9492163, -2089496, 2246943, 430576, 3466065, 1578813, 2738295,
261493, -425120, 3666399, 8796329, 9220040, 7148637, 5956722,
9980401, 7834421, 2041136, 3763240, -831391, 7963736, 8744496,
9593751, 4606042, 66708, -6652782, -6619264, 2614784, 5655774,
-9547771, 2456855, 4268450, 864132, 4601358, -3464052, -8987625,
-4427713, -126397, -5823810, 8443040, -7428684, -4365060, -6392451,
-6258724, -9124302, -6566562, -4153846, -9120859, 7061892, -7707777,
9342864, -2133124, -7068189, -8657201, 2752682, -9943634, -8650517,
-5219095, 2305245, -1500154, 8915790, -2805210, 1860598, 3361037,
-8040669, 5809813, -2243400, -3418428, -1810675, -5203397, -7879177,
6898143, 7749161, -2810814, -7525359, -793458, 608571, -9383497,
9531109, 6862130, -3381989, 2332039, 6018975, -3350279, 7266303,
-7170480, -1127784, 578313, 6018329, 8822950, 4214273, -372530,
2706552, -4905224, 3324641, -5403812, 9319424, -2882974, -9228107,
6151855, 2634284, 7000575, 3215247, 5067619, 5076150, 1595871,
748735, -9225927, 1962290, 4653714, 697462, 2996679, -7562085,
-5387705, -912530, 1763635, -6139098, 2103001, -6316004, -3469182,
-3818553, 8854173, 422707, -3826706, -9777012, 7452324, 3665456,
-9458220, 4828502, 2641583, 5107388, -4201437, 5486625, -9315573,
1417427, -1838955, 9042987, -9704280, 7868946, -6737802, 4462332,
-5771637, 635858, 1438260, 8940144, 9385885, 3522022, -9736738,
-4387243, -8611088, 8733735, -2087884, 8299364, -1004025, 2674570,
4247204, 1972151, -2092476, -1318052, -796315, -6487458, 8714867,
-9966767, -5459861, -1286737, 9442201, -2065902, 2575270, 7184243,
5916475, -5728128, -3044939, 6372732, 4902791, 3474374, -7462481,
-9886552, -8361835, -5022392, -4583670, 3990789, -1051830, 8606314,
6365011, 6751820, 1727390, -2005234, -5845824, 9572998, 6867269,
4000416, 5629823, -2918551, 7278467, 9865305, 3781390, -1518411,
-7124219, 3800842, -4492377, -7479001, 4144917, 4639464, 7161451,
3391326, -2429792, 8240315, -8667371, 101661, -6049927, -9729041,
-2210443, -6907416, -1355534, 6292201, -1169114, -4565077, 3214740,
-6122903, 8326559, -3973709, 2313703, 9645383, 6119383, 8317176,
8177731, 7758979, 3037198, -9543017, -3436171, 3280360, -1444577,
-40402, -8372623, 6672469, 9125222, 6161730, 3783090, -2778572,
-8014616, -1588372, -3200391, 7126312, -5091311, -3637052, -6600914,
9034974, -6246289, -4974981, -9711741, -7867786, -9808240, 450272,
-3222991, -8251454, 3599528, -33487, -1114626, 8414308, -2607016,
1690025, 5981016, -2898849, -4650973, -8085619, -4875585, -2677275,
-7329644, -9730701, -5563788, 4635028, -4232606, 1863619, -9081061,
-8966306, 4907349, 348942, -6309867, 2436213, -6340842, 8276407,
-1112458, 4073087, 6632641, -6044509, -1714553, -9905887, 8140713,
-5566484, -8187046, -3636448, 560425, 9931445, -8142363, 1928694,
6652925, 5094575, 5525595, 9847315, 5323311, 9123454, 7425631,
2116547, 9033708, -2228326, 2858537, 5452249, -3388576, 8859366,
5965629, -9904937, 8961420, -8794807, 4363288, -1067547, 1903643,
-6637956, 3736544, 9150157, -3977433, 4333094, -1170635, -4933425,
5815702, 1846616, 793301, -9206787, -227043, -7076926, -461803,
-7477454, -1297664, 47425, 8506054, 8264895, -1199514, -4031592,
1245359, 2840097, 6948011};

testTwoSum(nums7, 492, 7828670);
straight-into-the-wall marked this conversation as resolved.
Show resolved Hide resolved
printf("All tests have successfully passed!\n");
}

/**
* @brief Main function
* @returns 0 on exit
*/
int main(void)
{
test(); // run self-test implementations
return 0;
}
straight-into-the-wall marked this conversation as resolved.
Show resolved Hide resolved